COMMITMENTS AND CONTINGENCIES	9 Months Ended
Sep. 26, 2026
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Litigation A putative securities class action (Securities Class Action) was filed on May 19, 2023 against the Company and a number of its current/former officers in the United States District Court for the District of Massachusetts. On August 31, 2023, the court appointed the State Teachers Retirement System of Ohio as lead plaintiff. An amended complaint was filed on November 14, 2023 that, among other things, included only James Foster, the then current Chief Executive Officer and David R. Smith, the former Chief Financial Officer as defendants along with the Company. The amended complaint asserted claims under §§ 10(b) and 20(a) of the Securities Exchange Act of 1934 (the Exchange Act) on behalf of a putative class of purchasers of Company securities from May 5, 2020 through February 21, 2023, alleging that certain of the Company’s disclosures about its practices with respect to the importation of non-human primates made during the putative class period were materially false or misleading. On July 1, 2024, the court dismissed the complaint, denied the plaintiff’s informal request for leave to amend, and entered judgment for defendants. On July 30, 2024, the plaintiff filed a notice of appeal in the United States Court of Appeals for the First Circuit. Oral arguments took place on May 5, 2025. On August 15, 2025, the U.S. Court of Appeals for the First Circuit reversed in part and vacated in part the district court’s dismissal on the pleadings of the securities fraud claims. The case returned to U.S. District Court for the District of Massachusetts. On October 16, 2025, the plaintiff filed a motion to withdraw the State Teachers Retirement System of Ohio as lead plaintiff, due to lack of standing, and substitute Oklahoma Firefighters Pension and Retirement System. On September 2, 2026, the court granted the motion and appointed Oklahoma Firefighters Pension and Retirement System as lead plaintiff. On September 15, 2026, Oklahoma Firefighters Pension and Retirement System filed a second amended complaint that names only the Company and James Foster as defendants, narrows the putative class period to November 30, 2022 through March 15, 2023, and removes the alleged misstatements that the district court and the First Circuit determined were not actionable. On October 15, 2026, the Company filed a motion to dismiss the second amended complaint on the issue left unresolved by the First Circuit’s decision. Plaintiff’s opposition is due by November 16, 2026. While the Company cannot predict the final outcome of this matter, it believes the class action to be without merit and plans to vigorously defend against it. The Company cannot reasonably estimate the maximum potential exposure or the range of possible loss in association with this matter. On November 8, 2023, a stockholder filed a derivative lawsuit in the U.S. District Court of the District of Delaware asserting claims on the Company’s behalf against the members of the Company’s Board of Directors and certain of the Company’s current/former officers (James Foster, the then current Chief Executive Officer; David R. Smith, a former Chief Financial Officer; and Flavia Pease, the then current Chief Financial Officer). The complaint alleges that the defendants breached their fiduciary duties to the Company and its stockholders because certain of the Company’s disclosures about its practices with respect to the importation of non-human primates were materially false or misleading. The complaint also alleges that the defendants breached their fiduciary duties by causing the Company to fail to maintain adequate internal controls over securities disclosure and compliance with applicable law and by failing to comply with the Company’s Code of Business Conduct and Ethics. On August 2, 2024, a different stockholder filed a lawsuit in the U.S. District Court of Delaware asserting similar derivative claims on the Company’s behalf against members of the Company’s current and former Board of Directors and the same current/former officers based on similar allegations of purportedly misleading disclosures and non-compliance with legal rules and ethics standards in respect of the importation of non-human primates, as well as insider-trading claims against certain of the defendants. Both of these lawsuits are currently stayed by agreement of the parties pending resolution of the motion to dismiss in the Securities Class Action pending in the United States District Court for the District of Massachusetts. While the Company cannot predict the outcome of these matters, it believes the derivative lawsuits to be without merit and plans to vigorously defend against them. The Company cannot reasonably estimate the maximum potential exposure or the range of possible loss in association with these matters. Aside from the matters above, the Company believes there are no other matters pending against the Company that could have a material impact on the Company’s business, financial condition, or results of operations.

A putative securities class action (Securities Class Action) was filed on May 19, 2023 against the Company and a number of its current/former officers in the United States District Court for the District of Massachusetts. On August 31, 2023, the court appointed the State Teachers Retirement System of Ohio as lead plaintiff. An amended complaint was filed on November 14, 2023 that, among other things, included only James Foster, the then current Chief Executive Officer and David R. Smith, the former Chief Financial Officer as defendants along with the Company. The amended complaint asserted claims under §§ 10(b) and 20(a) of the Securities Exchange Act of 1934 (the Exchange Act) on behalf of a putative class of purchasers of Company securities from May 5, 2020 through February 21, 2023, alleging that certain of the Company’s disclosures about its practices with respect to the importation of non-human primates made during the putative class period were materially false or misleading. On July 1, 2024, the court dismissed the complaint, denied the plaintiff’s informal request for leave to amend, and entered judgment for defendants. On July 30, 2024, the plaintiff filed a notice of appeal in the United States Court of Appeals for the First Circuit. Oral arguments took place on May 5, 2025. On August 15, 2025, the U.S. Court of Appeals for the First Circuit reversed in part and vacated in part the district court’s dismissal on the pleadings of the securities fraud claims. The case returned to U.S. District Court for the District of Massachusetts. On October 16, 2025, the plaintiff filed a motion to withdraw the State Teachers Retirement System of Ohio as lead plaintiff, due to lack of standing, and substitute Oklahoma Firefighters Pension and Retirement System. On September 2, 2026, the court granted the motion and appointed Oklahoma Firefighters Pension and Retirement System as lead plaintiff. On September 15, 2026, Oklahoma Firefighters Pension and Retirement System filed a second amended complaint that names only the Company and James Foster as defendants, narrows the putative class period to November 30, 2022 through March 15, 2023, and removes the alleged misstatements that the district court and the First Circuit determined were not actionable. On October 15, 2026, the Company filed a motion to dismiss the second amended complaint on the issue left unresolved by the First Circuit’s decision. Plaintiff’s opposition is due by November 16, 2026. While the Company cannot predict the final outcome of this matter, it believes the class action to be without merit and plans to vigorously defend against it. The Company cannot reasonably estimate the maximum potential exposure or the range of possible loss in association with this matter.

On November 8, 2023, a stockholder filed a derivative lawsuit in the U.S. District Court of the District of Delaware asserting claims on the Company’s behalf against the members of the Company’s Board of Directors and certain of the Company’s current/former officers (James Foster, the then current Chief Executive Officer; David R. Smith, a former Chief Financial Officer; and Flavia Pease, the then current Chief Financial Officer). The complaint alleges that the defendants breached their fiduciary duties to the Company and its stockholders because certain of the Company’s disclosures about its practices with respect to the importation of non-human primates were materially false or misleading. The complaint also alleges that the defendants breached their fiduciary duties by causing the Company to fail to maintain adequate internal controls over securities disclosure and compliance with applicable law and by failing to comply with the Company’s Code of Business Conduct and Ethics. On August 2, 2024, a different stockholder filed a lawsuit in the U.S. District Court of Delaware asserting similar derivative claims on the Company’s behalf against members of the Company’s current and former Board of Directors and the same current/former officers based on similar allegations of purportedly misleading disclosures and non-compliance with legal rules and ethics standards in respect of the importation of non-human primates, as well as insider-trading claims against certain of the defendants. Both of these lawsuits are currently stayed by agreement of the parties pending resolution of the motion to dismiss in the Securities Class Action pending in the United States District Court for the District of Massachusetts. While the Company cannot predict the outcome of these matters, it believes the derivative lawsuits to be without merit and plans to vigorously defend against them. The Company cannot reasonably estimate the maximum potential exposure or the range of possible loss in association with these matters.